18903542 has 16 divisors (see below), whose sum is σ = 33197472. Its totient is φ = 7903680.

The previous prime is 18903517. The next prime is 18903553. The reversal of 18903542 is 24530981.

It is a junction number, because it is equal to n+sod(n) for n = 18903499 and 18903508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15893 + ... + 17040.

It is an arithmetic number, because the mean of its divisors is an integer number (2074842).

Almost surely, 2^18903542 is an apocalyptic number.

18903542 is a deficient number, since it is larger than the sum of its proper divisors (14293930).

18903542 is a wasteful number, since it uses less digits than its factorization.

18903542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32983.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 18903542 is about 4347.8203734745. The cubic root of 18903542 is about 266.3878394621.

The spelling of 18903542 in words is "eighteen million, nine hundred three thousand, five hundred forty-two".